Block-making machine



June 16, 1925.

M. FREEDMAN BLOCK MAKING vMAGHINE Filed May 5 1924 2 Sheets-Sheet l M. FREEDMAN BLOCK MAKING MACHINE June '16, 1925.

Filed May 5, 1924 2 Sheets-Sheet V2 Patented June 16, 1925.

UNITED sTATEs PATENT CFFICE.

MAX EREEDMAN, CE CHELSEA, MASSACHUSETTS.

t [BLOCK-MAKING MACHINE.

Application filed May 3,

T oaZZ whom t 07mg/ concern f l f Be it knownfthat I, MAX FREEDMAN, av citizen of the United States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented an 'Improvement in Block-Making Machines, yof which the vfollowing is a specification.

This invention relates to a machine for making hollow cement building blocks and the like and has, among its objects, the provision of a machine of simple and inexpensive construction, that has a minimum` of machinedparts, is easyto operate, has yimproved means for guiding the cores into and out of tliemold box, means permitting the cores readily to be detached from the operatingv mechanism,` andr improved' Voperating mechanism. l

Fig. 1 is a side'elevation of the machine embodying the invention. l

Fig; 2 is a plan view of Fig; 1.

Fig. 3 is a -vertical sectional elevation along line 3-3 of Fig. 2. f n

Fig. 4 is a vertical-sectional detail illustrating the relation of the partswith the cores retracted and thefmold boxopen and supporting a finished block. 1

Fig. 5 is a view similar Ato Fig. 4 but with the mold box closed and the cores disposed partly therein.

Fig. 6 is a perspective view of the coreoperating lever.

Fig. 7 is a detail illustrating particularly the manner of supporting one of the sideplates of the mold boxin open position.

As here shown the machine embodying the invention includes the frame having the supporting legs 10 connected'and separated at the top by the bed-plate 11, and said bed plate is formed or provided withan upstanding flange 12 along the rear redge thereof. A back-plate '13 is fixed rigidly to said flange by suitable means as the bolts 14 and is in eli'ect a part of the :trame structure. Said back-plate 13 is formed or provided with two apertures 15 therein, which apertures are herein shown as rectangular, and through which apertures suitable cores 16 are adapted to be extended. K

The mold box includes, in addition to the bed-plate 11 and back-plate 12, a front-plate 18 and two side-plates 19 and 20. Said front-plate is pivotedto the bed-plate by the pivot pins 21 and is adapted to be. moved from a vertical position, as shown inFig. 3,

1924. seria1No.71o,9s1.

to a horizontal position, as shown in Fig. 4. Said front-plate is adapted to be supported ranged to engage the front-edge of the bedplate, as shown, thereby to limit the movement of the front-plate and form a support therefor.

SaidV side-plates 19 and 2O are pivotally connected, at the :front edges thereof, to the.

opposite side edges of the front-.plate and may be pivoted on the pivot rods 24 and 25 Carried by said frontslate. Said sideplates 4may beformed wlth lugs 26 which are adapted to engage the 'front-plate and support said side-plates in a horizontal position with the `front-plate as shown in Fig. 7. Said side-plates may be provided with pivoted handles 28 which are adapted to overlie the opposite sideedges of the backplate and serve to lock the mold releasingly in position for block-molding.

The cores 16 are here shown as of rectangular cross-section and taper slightly toward their free ends, whereby they may be kwithdrawn readily from the molded block. Said cores are adapted to be moved within the apertures 15 in the back-plate 13 and into the mold box, andthe free ends thereof are adapted to enter apertures 30 in the :trontplate 18 whereby the cores may be securely supported with relation to the core box during the molding of the block. Said frontplate maybe formed or provided with flanges 31 which extend into said openings 30 and serve as abutments to limit the inward movement of the cores. y

As here shown, two cores 16 areg'provided and both are arranged in spaced horizontal alignment and are adapted to be moved simultaneously into and out of the mold. Each core may be formed or provided with an extensionor lug 33 at its outer end and said lug may have an aperture 34 for connection with its operating mechanism.

The core-operating mechanism includes an operatinglever 35 which is formed or provided with the spaced ears 36 at its upper end. Said ears are adapted to be disposed between the lugsSB of said cores; and aligned apertures 37 are formed in said 'ears which are adaptedto be aligned with the apertures 34 in said core-lugs. A bolt 38 is passed loosely through all apertures and serves to connect the cores pivotally with said operating lever 35, and the ears 36 of said arm are adapted to engage said cores and assist in preserving the horizontal alignment of the cores. Said cores may be removed readily by removing the nut 39 on the end of said bolt 38, and withdrawing the bolt :trom position.

Said operating arm is tor-med or'provided, at its lower end, with an elongated hub 40, which hub extends rlaterally on both sides of said'arn'i. Said hub is received between ears 4l extended rearwardly lfrom the supporting lugs l() and is adapted to engage said ears whereby to be held from undue lateral movement. Said hub is formed withan aperture 4Q extended from end to end ot' it. A shaft 43 is extended loosely through said aperture and also loosely through aligned apertures in said ears Lil 'and forms a lpivotal support for said'operating arm.

VSaid operating Varm may-be :formed with a lug i-5 intermediate its length vand said lug` may have a recess 4.6 therein in which an operating handle 47 may be received removably and by which said arm may be reciprocated about its pivot shaft 48, whereby to move the'co'res within and withdraw them from the mold'box. Preferably7 however, said operating 4arm is operated by means which permits the operating-` handle tobje `located in a more Convenient position forengagement by the operative. F or this purpose anoperating'handle 50 is disposed at one side of themachine and is adapted to be moved in an approximately vertical plane for reciprocating the cores.

Said handle 50 may be iixed, at its rear end, toa horizontal sha-'Et 5l, which shaft may be pivotally supported in the rear of the -backplate Bin suitable lugs 52 integral with or attached tothe frame' of the machine. An arcuate cam-member is iixed to said shaft 5l intermediate its length and e box.

saidV cam-member is extended rearwardly into proximity with said operating arm The outer face of said cam-member is adapted to' engage said arm directly and thereby move said arm in a position to retract the cores. A U-shaped yoke 57 may be attached to said arm 35 and enclose said cam-member7 and said yoke may. support a pivotedroller 5S, which roller is adapted to be engaged by the inner face 59 ofy said cammember, wherebyto actuate said arm in a direction -to move the'cores Vinto the mold From the construction, it is apparent that an upward movement of said handle 50 serves to move the cor-es into the mold box and a downward movement serves to withdraw the cores.

The movement of the operating arm 35 in a-direction to withdraw the cores may be limited by an abutment G2, which abutment may be carried by the hub 40 o said operating arm and extend over one of the ears il of said frame in position to engage a cooperating abutment G3 carried by said ear.

By reason of the angulaimovement ot the operating arm 35 about its pivotal support, and the desirably loose connections between the cores and said arm7 the weight of the cores in entering the core box would cause them to tilt upon the lower `edges of the apertures in the back-plate 13 and occupy some position as that shown in the dotted lines, Fig. 5, and thereby be misaligned with the aperture 30 in the frontplate 18.

It is afeature of this invention to provide means to guide and support the cores for movement into and out of the mold box and preferably only during the latter part of the inward movement 'and first part of the outward movement thereof, or during such a portion of the movement oi the core that the weight oit' that portion of the cores within the mold box overbala-nce the outer portion of the cores.

The core supporting and guiding means includes the outer extensions 7 0 and 7l, which extensions may be integrally orotherwise formed with the back-plate 13 and extended rearwardly there'irom Valong the path of movement of the cores. Said extensions are formed with approximately parallel top and bottom surfaces which are adapted to be received within recesses 72 disposed within the lvertically spaced and parallel guidelugs or projections 73 extended laterally from the rear or outer end-portions of said cores. in intermediate projection 7 a is extended rearwardly from said baclrplate and between said cores and is adapted to be slidably engaged by similar guide-luws 75 extended from the proximate faces or' said cores.

As thus arranged, the cores are tree from engagement with said projectionsfor a large proportion of the total range of their Inovement and, consequently, fric-tional resistance is at a minimum and the cores may be moved easily. rlhe length and arrangement of said projections and'guide lugs are arrangedl to be such that both are moved into engaging relation only during the latter part of the inward movement of the cores, or just before the cores are overbalanced in the mold box and thereby prevent disalignment of the cores due to such overbalanciiig and serve to Aguide them into a seating position in the apertures 30 of the front plate 18.

The construction is ksuch that 'trictional resistance to movementot the cores is kept down and the rear ofthe machine is free from obstructions which may tend Jto-hinder the convenient detachment and removal oit the cores from the machine.

claim:

l. A block making machine including a mold box having a rigid back-plate formed ci" A i y therethrough,

with a pairiof horizontally-aligned corereceiving apertures therein, cores slidable inv said apertures, an operating lever having means to support its lower end pivotally and having horizontallygsp'aced ears `at its upper end disposed between the outer ends'of said cores, said cores and ears having aligned apertures therethrough, and a boltloosely passed removably through saidfaligned having horizontally-spaced ears at its upper end disposed between the outer ends of said cores, said cores and ears having aligned apertures therethrough, a bolt loosely passed removably through said aligned apertures, said cores having vertically-spaced projections extended laterally from the oppositeA sides and at the outer ends thereof, and said back-plate having projections extended outwardly at the opposite sides ofthe apertures in said back-plate4 arranged to enter the spaces between the core-projections and provide guiding-supports for the cores during a portion only of the movement of said cores in and out of said mold box.

A block making machine including a mold box having a rigid back-plate formed with a pair of horizontally-aligned corereceiving apertures therein, `cores slidable in said apertures land formedwithears at their Aouter ends, an operating lever having means to support its lower end pivotally and having horizontally-spaced ears atV its upper end disposed between the ears of said cores, all of said ears having aligned apertures a bolt passed removably through said aligned apertures, said cores having vertically-spaced projectionsextended laterally from the opposite sides and at kthe outer ends thereof, and said back-plate having projections extended outwardly at the opposite sides of the apertures in said back-plate arranged to enter the spaces'between the core-projections and provide guiding-supports for the cores during a portion only of the movement of said cores in and out of said'mold box. Y

'4. A block making machine including a mold box having a rigid back plate formed with a core-receiving aperture therein, a core slidable in said aperture, an operating lever having its lower end pivotally sup-` ported and having its upper end directly pivoted loosely with the outer end of said core, said core having spaced lateral projections at its outer end, and said back-plate having a projection extended along said core and adapted to enter the space between the core-projections Vand supportv the core'y for movement, said yprojections arranged for core-guiding engagement during a portion only ofthe movement of the core.

5, A block making machine including a mold box having a rigid back-plate formed `with a core-receiving aperture therein, a

core slidable in said aperture, an operating lever having itslower end pivotally sup ported and having its upper end directlypivoted loosely with the outer end of said core, said core having vertically-spaced projections extended laterallyv from the opposite sides and at the outer end thereof, and said back-plate having projections extended along said core on opposite sides of said apertures, which projections are adapted to enter the spaces betweensaid coreprojec'tions and support the core for movement, said projections having suchlength as to engage and provide support for rthe core during a portion only of the movement `of the core.

6. A block making machine including a mold box having a rigid back-plate formed with a core-receiving aperturetherein, a core slidable in said aperture, `an operating lever having its upper end directly pivoted looselyto and arranged in supporting relation with the outerend of said core, and

having' means pivotally to support its lower end, said lever constituting guiding means for the outer end of said core, rand other guidingmeans for the outer end of said core veffective during a portion only of the movement of saidcore. n v

7. A block making machine including a mold box having a rigid back-plate formed with a core-receiving aperture therein, a core slidable in said aperture, an operating lever having its upper end directly pivoted loosely to and arranged in supporting relation with the outer end of said core, and having means pivotally to support its lower end, said lever constituting guiding means for vthe outer end of said core,k and other guiding means for the outer end of said core eii'ective during a portion only yof the' movement of said core, said other guiding means including a projection extended rearwa-rdly from said back-plate and along said core, and spaced projections extended laterally from said core and arrangedA to engage opposite sides of said back-plate projection.

8. Ablock-making machine including a mold box, a core movable into and out of said mold box, a core-operating lever having its upper end pivoted to said core, and having pivotal supporting means for its lower end, and means to reciprocate said operating lever including an operating handle, a cani arranged in operative engagement with said lever above the pivotal support for the lower end thereof, and means connecting said handle and cam.

l0. A block-making ina-chine including a mold box, a core movable into and out of said mold box, a core-operating lever havingfits upper end pivoted to said core, and having `pivotal supporting means for its lower end, and means to reciprocate said operating lever including a pivoted operating handle having a` cam-.extension disposed in operative relation with said operatingrlever.

11. A block-making machine including a mold box, a core movable into and out of said mold box, a core-operating lever having its upper end vpivoted to said core, and having pivotal supporting means for its lower end, and means to reciprocate said operating lever including a shaft rotatably supported between said operating lever andV mold box, a cam fixed to said shaft and arranged in engaging relation with said oper ating lever, and an operating handle disposed at one side of said machine andv fixed to said shaft, whereby to reciprocate it.

12. A block-making machine including a mold box, a core movable into and out of said mold box, a core-operating lever having its upper end pivoted to said core, and having pivotal supporting means for its lower end, and means to reciprocate said operating lever including a shaft rotatably supported between said operating lever and mold box, an arcuate .cam fixed to said shaft and extended into position to engage said operating lever `with itsr outer cam-face, a roller carried by said lever and disposed behind saidcam in position to be engaged by the inner cam-face of said cam, and an operating handle disposed at one side oie said machine and xed to .said shaft, whereby to reciprocate said cam.

13. A block-making machine including a mold box, a core movable into and out or' said mold box, a core-operating lever having its upper end directly pivoted loosely to vsaid core, and having pivotal supporting means for its lower end, and an operating handle operatively connected with said lever `above its lower pivotal support.

14. A block-making machine including a mold box, a core movable into and out oi said mold box, and a core-operating lever having its upper end directly pivoted loosely to one end of said` core, and having pivotal supporting means for ,its lower end.

f l5. A block-making machine including a mold box, a core movable into and out of said mold box, a core-operating lever having its upper end pivoted to said core, and having pivotal supporting means for its lower end, and cam-operating means, for said lever.

In testimony whereof I have signed my name to .this speciiication.

MAX FREEDMAN. 

